So besides increasing government control or laying the groundwork for confiscation, what exactly does me having to do a background check every time I purchase a new gun accomplish?

It may be that some people become disqualified in between gun purchases. Most serious mental illness occurs in the early 20's. So somebody could have passed a background check before but then had a mental illness or committed a felony or a domestic violence misdemeanor.

You sound like somebody about to renounce your citizenship, under the current federal law you would not be able to possess a gun if you did that.

Anyway, a background check does not seem like that big a deal to me if they are done accurately and quickly.

If you think the government is laying the groundwork for confiscation then maybe you should stop posting stuff on the internet that would make it easier for them to find you.

Doesn't the government already know who has passed a background check and bought a gun?